Replacing caloric sugars with non-nutritive sweeteners creates a sustained energy deficit, which leads to fat loss and associated improvements in cardiometabolic health in individuals.

Study: The effects of non-nutritive sweeteners on energy and macronutrients intake in adults: a grade-assessed systematic review and meta-analyses of randomized controlled trials

This study found that swapping sugar for artificial sweeteners helps people eat fewer calories, which could help them lose weight — but it didn’t check if they actually lost fat or got healthier.

Study: 614-P: Effect of Non-nutritive Sweetener Sucralose on Cardiometabolic Risk Factors among Overweight and Obese Adults in India—A Randomized Clinical Trial

This study found that when overweight people swapped sugary drinks for ones with artificial sweeteners, they lost belly fat and their blood sugar and cholesterol improved—even if they didn’t lose much weight. That supports the idea that swapping sugar for fake sweeteners helps your body stay healthier.